(1) water retention and flow characteristics;

(2) shear strength and stiffness at various temperatures;

(3) state-dependent elasto-plastic constitutive modelling; and

(4) field monitoring and engineering applications.

This second edition uniquely covers fundamental topics on unsaturated soil that are not covered in other similar books, including:

• the state-dependency of soil-water retention behaviour and water permeability functions, such as dependence on engineering activities;
• small strain stiffness considering the influence of wetting-drying cycles and recent suction history, such as that due to climate change;
• suction effects on dilatancy and peak shear strength;
• cyclic thermal effects on soil behaviour;
• state-dependent elastoplastic constitutive modelling of monotonic and cyclic behaviour; and
• engineering applications such as the South-to-North Water Transfer Project; an earthen landfill cover system devoid of geomembrane in the Xiaping landfill, Shenzhen; and a 15-m-deep multi-propped excavation in Tianjian, China.